[roll third_party/pigweed] pw_tokenizer: Add #[used] to token Rust database entries

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/189293

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 45be7b141b8be70..9ab076f1168d562
Roller-URL: https://ci.chromium.org/b/8757863247170075329
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I0b1b438dfce1f1cf6f8fe61d1c0d3c57ae5d9b4a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/189302
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 45be7b1..9ab076f 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 45be7b141b8be70b02b5dff957ec81449956a9ee
+Subproject commit 9ab076f1168d5628e2fabe814a59f77e7d715c18